144件が見つかりました。

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第5回
米国IST（Inservice Testing）の規格基準の概要
著者:
本陣 雅夫,Masao HONJIN
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This paper shows outline of US Inservice Testing compared with other inspection and maintenance activities and the ASM E Operation and Maintenance Codes, Standards and Guides, the code portions of which are endorsed by NRC and used at pl ants in the same way as ISI codes and standards. Then review of recently development activities for the ASME Codes and the insight for effectiveness of the testing standards in plant management in Japanese nuclear power unit is provided....
英字タイトル:
Outline of US Codes and Standards on Inservice Testing
第5回
粗大粒を持つ材料の内部残留応力の評価法の開発
著者:
鈴木 賢治,Kenji SUZUKI
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応力腐食割れ (SCC) のき裂の発生,進展においては,表面から内部応力の応力評価が不可欠である. 一 一般のX線応力測定法は, 等方均質な多結晶体を前提と した方法である1). 粗大粒の応力測定の研究 2) も進め られているが,それで解決できない場合も多い。例え ば,溶接部は粗大粒かつ集合組織を持ち,従来のX線 応力測定標準がどこまで適用できるかを検討してい る所である3),一方,内部の非破壊的な応力測定も要求される.内 部の応力測定では,中性子線が優れた方法といえる が,中性子束の強度が小さいために長時間を要する. また,中性子応力測定のゲージ体積も 1mm の寸法と 空間分解能が大きいために表面付近を測定するには, 改善する必要がある.それに対し,高エネルギー放射 光は高輝度かつ十分な透過力を持つので,10mm 以内 の内部であれば,um オーダーの空間分解能で測定可 能である.しかし,いずれにしても粗大粒の問題を解 決する必要がある. 1. 本提案では,粗大粒のための高エネルギー放射光X 線を利用した応力測定を提案する...
英字タイトル:
Internal Stress Measurement for Coarse Grains
第5回
複雑かつ階層構造を有する材料の中で起こるマルチスケールな照射損傷プロセスをいかに予測するか？
著者:
森下 和功,Kazunori MORISHITA,渡辺 淑之,Yoshiyuki WATANABE,吉松 潤一,Jun-ichi YOSHIMATSU
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Challenging efforts are discussed to establish an advanced methodology for prediction of material's property and performance changes by irradiation, which will be necessary by all means for the advanced reactor maintenance technology in the future. The changes of material's properties and perfor mance caused by irradiation, such as irradiation-induced hardening, ductility loss, and material's degradation leading to reduction in reactor lifetime, are primarily determined by microstructural changes in materi...
英字タイトル:
How can we predict microstructural changes caused by the multiscale irradiation process occurred in materials havingcomplicated and hierarchical structures?
第5回
計器のオンライン状態監視技術
著者:
林 俊文,Toshifumi HAYASHI,玉置 哲男,Tetsuo TAMAOKI,廣瀬 行徳,Yukinori HIROSE,榎本 光広,Mitsuhiro ENOMOTO,前川 立行,Tatsuyuki MAEKAWA,真杉 剛,Tsuyoshi MASUGI,清水 俊一,Shunichi SHIMIZU
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The authors developed an online method to monitor the condition of sensors implemented in Nuclear Power Plants. The method employs Sequential Probability Ratio Test (SPRT), and calculates log-likelihood function of each sensor readings obtained through the plant process computer to determine whether the value of the l og-likelihood function exceeds a statistically defined setpoint. A study on data collected during startup testing of a BWR power plant showed that the method wa s applicable for 1824 sensors...
英字タイトル:
Online Monitoring of Nuclear Power Plants Instrumentation
第5回
論点評価会議の主旨と視点
著者:
宮 健三,Kenzo MIYA
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An evaluation committee on nuclear issues was established at Japan Society of Maintenology t o discuss those issues and dispatch a report to media and self-governing body. This paper dis cusses logics of maintenance, maintenance strategy and the relation among troubles, nuclear safety, and maintenance. The report is a summary of the discussion based on expertise of JSM....
英字タイトル:
Aims and viewpoint of evaluation committee on nuclear issues
第5回
赤外熱画像を用いた核融合実験炉ダイバータ用非破壊検査装置の開発
著者:
横山 堅二,Kenji YOKOYAMA,鈴木 哲,Satoshi SUZUKI,江里 幸一郎,Kouichiro EZATO,関 洋治,Yohji SEKI,榎枝 幹夫,Mikio ENOEDA,秋場 真人,Masato AKIBA
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An infrared thermography NDE facility which is utilized in the acceptance test of ITER d ivertor components has been developed in JAEA. This NDE facility can inspect the integri ty of the bonding interface of the divertor components based on its surface temperature response by means of switching of hot (95 deg C)/cold (5 deg C) water. The advantages of this facility are 1) to have active coolant purging system which enables rapid temperatu re change and 2) to inspect the surface and the both side walls of...
英字タイトル:
Development of a non destructive evaluation system using infrared images for divertor on nuclearfusion experiment reactor
第5回
赤外線サーモグラフィによる設備診断
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CBM(Condition Based Maintenance) has high safety and hight cost performance. “A vibration method“ and “the lubricating oil method“ are already applied in a chemical plant and the steel industry in our country as a maintenance method of a dynamic device such as the motor mainly. However, the present status about the static machine such as electric facilities depends on TBM (Time Based Maintenance). I regard the temperature measurement of facilities and the transfer of the thermal energy as the most importan...
英字タイトル:
Facilities diagnosis by the infrared thermography
第5回
超音波の可視化技術を用いたフェーズドアレイUT条件の評価
著者:
古川 敬,Takashi FURUKAWA,古村 一朗,Ichirou KOMURA
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Phased array provides many advantages over conventional ultrasonic testing method, but phased array has also limitations. This paper describes typical results of the experimental sound field analysis generated from the array probe. A photo-elastic ultrasonic visualization technique was applied in this study. The so und field of shear wave generated from the array probe was equivalent to that from the fixed angle probe....
英字タイトル:
Evaluation of Phased Array UT Conditions using Ultrasonic Visualization Technique
第5回
超高速二相流によりオリフィス下流域に発生するエロージョン現象の解明
著者:
阿部 祐子,Yuko ABE,結城 和久,Kazuhisa YUKI,橋爪 秀利,Hidetoshi HASHIZUME,戸田 三朗,Saburo TODA
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This work addresses LDI (Liquid Droplet Impingement) accompanied with pipe wall thinning in nuclear and thermal power plant s. In order to clarify the factors that affect the wall thinning, the structure of supersonic two-phase flow after an orifi ce is visualized with a digital video camera. The visualization experiment proves that the droplets impinges the pipe wall shortly after the orifice and that the amount of water droplets that passes through the orifice is the important parameter....
英字タイトル:
Evaluation of Liquid Droplets Impact Erosion in downstream areas of an orificecaused by supersonic two-phase flow
第5回
連成解析による気液二相流中構造物の振動・腐食評価手法の開発-3 流動解析と腐食解析の連成による単相および二相流中での配管減肉速度評価
著者:
内藤 正則,Masanori NAITOH,内田 俊介,Shunsuke UCHIDA,岡田 英俊,Hidetoshi OKADA,上原 靖,Yasushi UEHARA,越塚 誠一,Seiichi KOSIZUKA
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In order to establish safe and reliable plant operation, it is required to forecast future troubles on structural materials based o n combined analyses of flow dynamics and corrosion and to mitigate them before they become serious on plant operation. In the prese ntation, discussion is focused on wall thinning of major pipes due to single and two phase flow. FAC (flow accelerated corrosion) is considered for wall thinning in single phase flow, while LDI (liquid droplet impingement) is evaluated for that in...
英字タイトル:
Development of Evaluation Method on Flow-induced Vibration and Corrosion ofComponents in Two-phase Flow by Coupled Analysis - 3Evaluation of Wall Thinning Rate in Single and Two Phase Flow with the Coupled Model ofFlow Dynamics Analysis and Corrosion Analysis
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